More abilities

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/Forewarn.cs

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+using PkmnLib.Static.Moves;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Forewarn is an ability that reveals the opponent's move with the highest base power when the Pokémon enters battle.
+/// This ability is commonly associated with Drowzee and Hypno.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Forewarn_(Ability)">Bulbapedia - Forewarn</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "forewarn")]
+public class Forewarn : Script
+{
+    /// <inheritdoc />
+    public override void OnSwitchIn(IPokemon pokemon, byte position)
+    {
+        var battleData = pokemon.BattleData;
+        if (battleData == null)
+            return;
+
+        var opponents = battleData.Battle.Sides.Where(x => x != battleData.BattleSide).SelectMany(x => x.Pokemon)
+            .WhereNotNull();
+
+        var highestPowerMove = opponents.SelectMany(opponent => opponent.Moves).WhereNotNull().Select(move => new
+        {
+            Move = move,
+            Power = GetBasePower(move.MoveData),
+        }).OrderByDescending(move => move.Power).FirstOrDefault();
+
+        battleData.Battle.EventHook.Invoke(new AbilityTriggerEvent(pokemon)
+        {
+            Metadata = new Dictionary<StringKey, object?>
+            {
+                { "highest_power_move", highestPowerMove?.Move },
+                { "power", highestPowerMove?.Power },
+            },
+        });
+    }
+
+    private static byte GetBasePower(IMoveData moveData)
+    {
+        // OHKO moves (handled by secondary effect)
+        if (moveData.SecondaryEffect?.Name == "one_hit_ko")
+            return 150;
+
+        return moveData.Name.ToString() switch
+        {
+            // 150 BP: Specific moves
+            "blast_burn" or "eruption" or "water_spout" or "fissure" or "guillotine" or "horn_drill"
+                or "sheer_cold" => 150,
+            // 120 BP: Counter, Metal Burst, Mirror Coat
+            "counter" or "metal_burst" or "mirror_coat" => 120,
+            // 80 BP: List of variable power and fixed-damage moves
+            "crush_grip" or "dragon_rage" or "electro_ball" or "endeavor" or "final_gambit" or "flail" or "fling"
+                or "frustration" or "grass_knot" or "guardian_of_alola" or "gyro_ball" or "heat_crash" or "heavy_slam"
+                or "hidden_power" or "low_kick" or "natural_gift" or "natures_madness" or "night_shade" or "present"
+                or "psywave" or "punishment" or "return" or "reversal" or "seismic_toss" or "sonic_boom" or "spit_up"
+                or "super_fang" or "trump_card" or "wring_out" => 80,
+            // 20 BP: Stored Power, Power Trip
+            "stored_power" or "power_trip" => 20,
+            _ => moveData.BasePower == 0 ? (byte)1 : moveData.BasePower,
+        };
+    }
+}